School seat and desk



(No Model.)

2 Sheets-Sheet 1. A. D. LINN. SCHOOL SEAT AND DESK.

Patented Sept 1, 1896.

Ill

mmnmm I {HM (No Model.) I 2 Sheets-Sheet 2.

' A. D, LINN. SUHOOL SEAT AND DESK.

No. 567,105. Patented Sept.'1, 1896.

mmuuwmunmg I UNITED STATES PATENT OFFICE.

ALLEN D. LINN, OF GRAND RAPIDS, MICHIGAN, ASSIGNOR TO THE GRAND RAPIDSSCHOOL FURNITURE COMPANY, OF SAME PLACE.

soHooL SEAT AND DESK.

SPECIFICATION forming part of Letters Patent No. 567,105, datedSeptember 1, 1896.

Application filed September 11,1895. Serial No. 562,168. (No model.)

T 60% whom it may concern:

Be it known that I, ALLEN D. LINN, a citi-I zen of the United States,residing at Grand Rapids, in the county of Kent and State of Michigan,have invented certain new and useful Improvements in School Seats andDesks, of which the following is a specification, reference being hadtherein to the accompanying drawings.

My invention relates to improvements in school seats and desks; and theobject of the invention is to provide a construction in which the deskmay be easily and quickly adjusted to any desired height and when soadjusted may be securely held in place with the least possible strainupon the parts, and, further, to provide a turning or pivoting seatwhich may be quickly adjusted toward and from the desk, means beingprovided whereby the seat is prevented from turning sufficiently tocause the back to come in contact with the desk.

The invention consists in the construction hereinafter described, andparticularly point- 2 5 ed out in the claims.

The invention is illustrated in the accompanying drawings, in which-Figure l is a side elevation of the desk. Fig. 2 is an elevation of thechair. Fig. 3 is 0 avertical section through the chair-standard. Fig. 4is a front view of the desk, partly in section. Fig. 5 is a section ofthe desk-standard, taken on line a; w of Fig. 1. Fig. 6 is a section ofthe chair-bracket on line y y of Fig.

5 2. Fig. 7 is a perspective view illustrating the stop for limiting theturning movement of the chair.

Referring first to the desk, the brackets B, which carry the box-desk o,are fitted to slide in grooves or ways A in the standards A. The outerside faces of these brackets B are preferably inclined or beveled, asshown at Z), Fig. 5, and bear against the sides a of the grooves in thestandard. A rod D extends through slots 1) in the brackets and throughopenings a in the standards, said rod being provided with a bearing-headd at one end and a nut 20, threaded upon the opposite end, ashereinafter described. A sleeve E surrounds this rod between the twobrackets and is provided ateach end with a gear-pinion H, which mesheswith a rack B, formed on the inner face of bracket B. The portion of thesleeve adjacent to the gear is squared, so that, when the parts areloosened, a suitable wrench maybe applied thereto and the sleeve turnedto cause the gears to engage the racks on the brackets and thus raisethe desk. After the desk has been adjusted to the proper 1 height thenut to is screwed down upon the end of the rod by means of a suitablewrench, such as that shown at F, and the bracket is thus clamped tightlyinto the groove in the standard.

The sleeve is accurately fitted to the space between the brackets andresists anyinward movement thereof during the clamping action, and therod and sleeve therefor not only serve as a lifting and clamping device,but also as a brace, giving strength and rigidity to the parts.

In order that the desk may be quickly and accurately adjusted to theproper height to suit the age of the pupil, I graduate the brackets, asshown in Fig. 1, one set of numerals, 1234, being provided extendingupwardly and serving to indicate the heights corresponding to the commonschool-desks,

' and another set of numbers, 9 1O 11 12, &c.

extending downwardly and indicating ap- 8o proximately the age of thescholar for whom the desk would be adjusted. I

The improved seat which I have designed to use with this desk comprisesa divided pedestal K, which receives the seat-support N. This support isprovided with a rack N which is engaged by a pinion M, keyed orotherwise secured on a headed bolt T, provided with a clamping-nut L.The opposite side of the pedestal is clamped by a nut and 0 bOlt It Whenthe chair is to be raised or lowered, the clamping-nut being loosened, awrench is applied to the head T of the bolt T and the chair may bequickly adjusted to the proper height while the child is seated thereon,after which the clamping-nut is tightened, drawing the sides of thepedestal tightly against the pinion and holding it securely againstmovement.

In order to provide fora limited amount of adjustment of the seat propertoward and from the desk, the rack is formed entirely around theseat-support, so that it may be rotated without disengaging the teethfrom the gear, and the upper end of the support is provided with anoitset portion Q, upon whichthe chair-bracket O is rotatably supportedby a central spindle R. Usually an eccentricity of an inch is foundsufficient to give the desired range of adjustment. Thus the chair maybe quickly adjusted to the proper height, and then by the eccentricsupport the necessary lateral adjustment may be effected to bring thepupil to the desired distance from the desk.

In order to prevent the chair from being swung around against the desk,a bumper u is provided on the support, which is engaged by a stop aconnected with the seat-bracket. A clutch IV is interposed between thestop and the seat-bracket, so that as the standard is turned to givelateral adjustment to the chair the seat may be raised to disengage theclutch and set in a position to just clear the edge of the desk.

I claim as my invention 1. An adjustable school-desk comprising thestandards having grooves or channels in their upper ends, bracketssupporting the desk and fitted to the grooves in the standards, the saidbrackets being channeled on their inner faces and having racks withinthe channels, a rod extending through the brackets and standards, and asleeve surrounding the rod but of less length than the said rod,

the ends of said sleeve extending into the channels of the brackets andbearing against the inner faces of said brackets, gears on said sleevemeshing with said brackets, and means for manipulating the rod totighten and loosen the parts, substantially as described.

2. In combination, a pedestal, a rotatable shank having an offset orprojection at its upper end extending to one side of the center of theshank, and a seat-bracket swiveled centrally of said offset whereby theshank may be rotated to adjust the seat in its relation to the desk andthe seat itself be permitted independent rotation, substantially asdescribed.

3. In a seat the combination with the pedestal of the rotatable andvertically-adj ustable shank having an offset at its upper end, the seatj ournaled on the end of said offset, stoparms carried by the seat and aprojection or stop on the offset arranged in the path of said stop-arms,substantially as described.

4. In combination, the pedestal, the rotatable shank, the seat-bracketeccentrically journaled thereon, and the stops adjustably connected withthe seat-bracket, substantially as described.

In testimony whereof I affix my signature in'presence of two witnesses.

ALLEN D. LINN. Witnesses:

L. '1. GIBSON, .'I. II. MEGREW.

